Human World

The Human World also known as Earth  was once under attack by the legions of demons led by the devil prince Mundus until Sparda saw the tyranny of his master's ways and woke up to justice and with his sword managed to seal the Temen-ni-gru tower away along with the legendary Demon King himself. He fought against an ancient evil even more powerful then Mundus, the great Devil King Argosax. The human world is the domain and home of the humans that exist in their natural state. Earth is obviously referred to as the Human World in the Devil May Cry universe, although the universe itself could be referred to as the Human World, however even if Earth can be considered the "Human World" none of the games feature real based places, but rather fictional ones, like "Mallet Island", "Vie de Marli (Dumary Island)", "Fortuna City" and "Dante's City" (which is never named at all). While the focus of many of the games is the demonic, and Dante often enters the true Demon World at the end of the game, the greater part of each game is set in a demonically-influenced Human World where Dante often has missions in ruins or demonic culture places such as the "Mallet Island" castle, the "Temen-ni-gru" tower, etc. However only low ranking demons inhabit the human world, while the high ranking demons are most seen in these demonic places, or specially summoned.

The Devil May Cry Manga explained that the human world and the demon world were both born of darkness and connected as one world thousands of years prior to even Sparda's existence. But the two worlds were separated because of the many differences between the humans and demons. Thus, light became the human world and darkness became the demon world.

Trivia

 * Devil May Cry 3 was the only game which features Dante's office during gameplay.